Integral radial cosmic ray gradients in the solar system from 1972 to 1982

Details Integral radial cosmic ray gradients in the solar system from 1972 to 1982 Integral radial cosmic ray gradients in the solar system from 1972 to 1982

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...279..151l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 279, April 1, 1984, p. 151-156.

Astronomy and Astrophysics

Astrophysics

15

Cosmic Rays, Radiant Flux Density, Radiation Distribution, Solar System, Explorer 50 Satellite, Periodic Variations, Pioneer 10 Space Probe, Solar Activity Effects, Solar Wind, Voyager 1 Spacecraft, Voyager 2 Spacecraft

Scientific paper

The cosmic-ray telescope data on IMP 8, Voyagers 1 and 2, and Pioneer 10 have been used to determine the integral radial cosmic-ray intensity gradients for energies greater than 60 MeV per nucleon. When the 26 day average counting rates are time-shifted for the effects of the outward propagation speed of the solar modulation, the average integral radial gradients (Gr) are 3.0 + or - 0.35 (percent/AU) from 1975 to 1982. Gr is independent to the first order of the cosmic-ray intensity and radial heliocentric distance out to about 30 AU. After the large transient variations in the cosmic-ray intensity in mid-1982, the integral gradients returned to their original values.

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